Jikei and Reiralie, you could hire other people to help you work on this game. The adult game dev I work for updates their game once a week without fail, has four constant workers and takes scene requests (within reason) every month. They also listen to the community for ideas and just to communicate with fans. Because I liked a devs game I got in touch with them and now I work on mobile testing for the mobile version. I also am providing scripts for them on another project. My point is, if the game is taking this long then maybe get another employee. Here is a look at the update history of Mythic Manor and the time between each update
Mythic Manor 0.1.0 Feb 10, 2018
Mythic Manor 0.2.1 Mar 10, 2018 28 days
Mythic Manor 0.3.1 Apr 21, 2018 42 days
Mythic Manor 0.4.0 May 29, 2018 38 days
Mythic Manor 0.5.1 Jul 13, 2018 45 days
Mythic Manor 0.6.0 Sep 9, 2018 58 days
Mythic Manor 0.7.0 Oct 27, 2018 48 days
Mythic Manor 0.8.0 Jan 6, 2019 71 days
Mythic Manor 0.9.0 Mar 15, 2019 68 days
Mythic Manor 0.10.1 May 24, 2019 70 days
Mythic Manor 0.11.1 Sep 29, 2019 128 days
Mythic Manor 0.12 Jan 4, 2020 97 days
Mythic Manor 0.13 Apr 3, 2020 90 days
Mythic Manor 0.14 Jun 5, 2020 63 days
Mythic Manor 0.15 Sep 4, 2020 91 days
Mythic Manor 0.16 Nov 7, 2020 64 days
Mythic Manor 0.17 Jun 8, 2021 213 days
Mythic Manor 0.18 Dec 4, 2021 179 days
Mythic Manor 0.19 Jun 4, 2022 182 days
Mythic Manor 0.20 Apr 25, 2023 325 days
Mythic Manor 0.21 Mar 4, 2024 314 days
Mythic Manor 0.22 Nov 23, 2024 264 days